WEST LAFAYETTE Ind. Purdue University said Monday a researcher there has developed a new method for killing some harmful bacteria in bagged produce, such as lettuce and tomatoes, that, if proven commercially viable, may reduce incidents of foodborne illness. Researcher Kevin Keener designed a device consisting of a set of high-voltage coils attached to a small transformer that generates a room-temperature plasma field inside a package, ionizing the gases inside, the university says. ...

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